Gravity Lens Throws Ancient Galaxy's Ring of Light Around Younger Galaxy | Video

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Europe's Atacama Large Millimeter/submillimeter Array (ALMA) has seen the light from a distant galaxy distorted around one that is is in its foreground. This animation explains how 'Einstein Lens' phenomenon works.

Credit: ALMA (ESO/NRAO/NAOJ), L. Calçada (ESO), Y. Hezaveh et al.

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